top officials also said morsi might be willing to postpone the referendum if he can reach some agreement with the opposition. on the syrian diplomatic front, secretary of state hillary clinton said today russia and the u.s. will support new efforts to mediate peace. but clinton underscored that the u.s. still insists that president bashar assad leave power. she spoke today in northern ireland, a day after meeting with russian foreign minister sergei lavrov and the u.n. envoy for syria, lakhdar brahimi. >> we reviewed the very mr. brahimi had his own additional information to contribute about what he is hearing from sources inside syria and both minister lavrov and i committed to support a renewed push by brahimi and his team to work with all the stakeholders in syria to begin a political transition. meanwhile, rebels in syria made the damascus international airport an official battleground. they said it's a legitimate target and they urged civilians to stay clear. fighting near the airport and around the capital city has intensified in the past week. the latest amateur video showed stree